Shutter-bower.



J. G. HUOT.

SHUTTER BOWER.

, APPLICATION FILED AUG-3|. 191s.

1,1M.,5%. v Patented Dec.14,1915.

JOSEPI-IS G. I-IUOT, 0F MONTREAL, QUEBEC, CANADA.

SHUTTER-BOWER.

Application filed August 31, 1915.

To all to 7mm it may concern:

Be it known that I, JosnPI-rs G. Hno'r, a subject of the King of GreatBritain, and resident of the city of Montreal, in the Province of Quebecand Dominion of Canada, have invented certain new and usefulImprovements in Shutter-Bowers, of which the following is a full, clear,and exact description.

This invention relates to improvements in shutter bowers, or as they aresometimes called, casement adjusters, and the object of the invention isto provide a device of this character which will be extremely smooth andsteady in operation, and which will not buckle when force is applied totelescope the same from its full extended position.

A further object is to provide a simple and inexpensive device whichwill not readily wear out, and in which the resistance to movement maybe readily adjusted.

The device consists essentially of a tube or barrel within which aplunger operates. One end of the barrel is pivotally connected to awindow sill and the opposite end of the plunger tothe easement. When theeasement is moved, the plunger is reciprocated in the barrel, and thisreciprocation is resisted by friction of a clutch carried by theplunger, so that. the easement will be held in any position, to which itis set. The plunger consists of a rod, carrying on its end within thebarrel, a clutch, formed of a number ofleaves of spring metal compressedwithin the barrel in such a way as to grip practically the entirecircumference of the barrel.

In the drawings which illustrate the in vention: Figure 1 is a sideelevation of the device showing the barrel in section. Fig. 2 is a planview of the clutch. Fig. 3 is a plan view showing the inner surface. ofone of the clutch parts. Fig. 1 is an enlarged end view of the plungerand clutch. Fig. 5 is an enlarged fragmentary sectional view of one ofthe clutch parts, on the line 55, Fig. 8. Fig. 6 is a view of thevarious blanks before bending and assembling to form one oftheclutchparts. 7

Referring more particularly to the drawings, 11 designates atubeorbarrelpivqtally Specification of Letters Patent.

Patented Dec. 14,1915.

Serial No. 48,212.

mounted at one end on a support 12, which may be attached to a windowsill and provided at the opposite end with a centrally apertured cap 13through which the rod 14 of the plunger passes. The end of the rodwithin the plunger .is provided with a clutch comprising a pair ofexpansible members 15 and 15 and the opposite end is pivotally securedto a support 16 which may be attached to a casement or shutter.

Each part of the clutch consists of a plurality of leaves, designated17, 17, 17, 17, the leaf 1? being outermost. These leaves decrease inwidth from the outermost to the innermost, as clearly shown in Figs. 3,4: and 6, while all are of the same length, with the exception of theouter leaf 1? which is slightly longer than the others, so that the endsthereof may be bent in, as shown at 18, to facilitate introduction ofthe clutch into the barrel. The outer clutch member is provided at eachend midway between the side edges with a pair of cuts 19 forming atongue 20, and each of the inner leaves 17, 17", 17 are provided on theends with notches adapted for the passage of the tongues 20therethrough. The notches 21 of the leaves 17 a and 17 are carried tosuch a depth that they terminate substantially in line with the roots ofthe tongues 20, but the notches 22 of the leaf 17 arecarried much deeperintov the material, so that they at least extend into line with the endof the tongue when folded back on the material of the outer leaf. Thesenotches 22 may also be slightly wider than the notches 21. If desired,cuts 23 may be formed in the leaf 17 in line with the sides of thenotches 21,

thus forming tongues 24 at the bottoms of the notches.

When the blanks have been cut to the shape shown in Fig.6 from springmetal, preferably hard bronze on account of its corrosion resistingcharacteristics, they are bent around their longitudinal axes to asuitable curvature, and are assembled in the order shown, so that thenotches 21 and 22 are all in register and in line with the tongues 20,which are then bent through the notches, so as to hold all the leavestogether. The

tqssues 20 a e t r e e s d w h r n p force the tongues 24 of the leaf 17down into the leaf notches 22 of the leaf 17 until the tongues 24 ofleaf 17 come into engagement with the leaf 17, and the tongues 20 of theleaf 17 lie flush with the surface of the leaf 17 as will be clearlyunderstood by reference to Fig. 5. It will be understood that when theleaf 17 is formed with the cuts 23 and tongues 21, the notches 22 ofleaf 17 need not be wider than the notches 21, but that if the leaf 17is formed without these cuts, and tongues, the notches 22 of leaf 17will require to be of slightly greater width than the notches 21 inorder to accommodate the displaced metal of the leaf 17. It will also beunderstood that the leaf 17 must not be construed as limited to a singleleaf, since this leaf represents any desired number of leaves insertedbetween the leaf 17 and the leaf 17", or if a very weak spring isdesired, the leaf 17 may be omitted altogether. It will thus be seenthat if complete, the clutch member is provided with a notch 25 at eachend. Pins 26 are driven through the plunger at suitable intervals apart,and project beyond the plunger slightly less than the thickness of theclutch members, so that when the clutch members are placed in positionaround the plunger, the notches 25 thereof will embrace the pins 26 ofthe plunger and hold the clutch members against longitudinal and rotarymovement independent of the plunger.

WVhile the clutch has been shown to consist of a pair of members, it isobvious that if desired, a single member of substantially cylindricalform, or three or more members similar to those shown in Figs. 2 and 3,but appropriately narrower, may be used.

As shown in Fig. 4, the curvature of the clutch members is of slightlygreater radius than the curvature of the barrel, so that the I clutchmembers will require to be sprung in order to insert them in the barrel,thus insuring considerable expansive pressure within the barrel. Incurving the clutch member leaves, the radii of the leaves may beshortened from the outer to the inner, so that when assembled, thecurvature of the leaves will be from a common center, or the curvatureof all leaves may have equal radii, so that when the leaves areassembled and clamped together, the inner leaves will exert anappreciable expansive pressure on V the outer leaves.

Such a structure will result in forming a much stlifer spring in eachclutch member, although the appearance of the assembled clutchmemberswill be explurality of independent parts each built up of a series ofresilient curved leaves, the curvature of said leaves being of greaterradius than the curvature of the barrel.

2. In a device of the character described, a barrel, a plunger therein,a clutch mounted on the plunger comprising a plurality of independentparts, each composed of a series of resilient leaves decreasing in widthfrom the outer to the inner.

In a device of the character described, a barrel, a plunger therein, aclutch on the plunger formed of a plurality of resilient leaves, curvedapproximately in conformity with the curvature of the barrel anddecreasing in width from the outer to the inner, and means integral withone of said leaves holding all the leaves together.

=l. In a device of the character described, a barrel, a plunger therein,a clutch on the plunger retained in compression by the barrel andfrictionally engaging the inner surface of the barrel, said clutchcomprising a series of thin resilient leaves decreasing in width fromthe outer to the inner, and means for holding the clutch against rotaryor longitudinal movement independently of the plunger.

In a device of the character described, a barrel, a plunger therein, aclutch surrounding the plunger and held in compression by the barrel,said clutch comprising a plurality of resilient leaves of varying Widthnotched at their ends and arranged with the notches thereof in register,and projections on the plunger engaging said notches and holding theclutch against rotary and longitudinal movement independently of theplunger.

6. In a device of the character described, a clutch member comprising aseries of cylindrically curved superposed leaves decreasing in widthfrom the outer to the inner, tongues integral with the ends of the outerleaf folded over the ends of the remaining leaves to hold all leavestogether, the inner leafhaving notches in the end thereof for thereception of portions of the inner leaf displaced by bending down of theouter leaf tongues.

7. In a device of the character described, a clutch member comprising aplurality of superposed leaves, tongues formed integral with the outerleaf and bent inwardly over the ends of the remaining leaves, and meansprovided for the reception of said tongues whereby the same will overlapthe inner leaf and be flush with the surface thereof.

8. In a device of the character described, a clutch comprising aplurality of superposed leaves, the outer leaf having at each;

being deeper than the notches of other In Witness whereof, I havehereunto set leaves, and tongues lntegml W1th the lnner my hand, 1n thepresence of two wltnesses.

leaf formed at the bottoms of its notches JOSEPHS G. HUOT. and displacedinto the deeper notch of the \Vitnesses:

5 intermediate leaf by the tongues of the outer S. R. XV. ALLEN,

lea-f. G. M. MORELAND.

(lepiet of thie patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. G.

